Does anyone have experience of the AJ6 engine upgrades (ECU + throttle butterflies etc.) or any alternative power upgrades on a V12 engine (XJS 5.3 H.E.). I am looking to sharpen up the car at reasonable cost - not a radical power upgrade.
thanks
A couple of years back Top Gear stuck a nitrous pack onto a V12 XJS and it beat everything! It wasn't that expensive either I seem to remember... AJ6 Engineering do a set of mods for both engines and I think it is run by someone who used to be at the factory...
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